App Store
Version 3.5.1 · 2026-10-29
Bug fixes
Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Not yet tested.
The store currently lists version 3.5.1, updated 2026-10-29.






Store screenshots supplied by the developer.
GrayZone reads light where you decide — not where
your camera guesses.
Built by Max of max&douglas — professional
photographer with 25 years in editorial and
advertising photography.
Zone System Mode
Measure a reference area first (Zone V), then check where the other tones will fall and their relative EV difference, for precise and consistent exposure.
Real SPOT Metering
Reads light exclusively in the area you select.
Ideal for portraits, complex lighting and critical
situations.
Calibrated to render the selected area as neutral gray.
Direct Exposure Control
Set ISO before metering, like a dedicated light meter.
Instant precise combinations of shutter speed
and aperture.
Exposure lock with AE LOCK.
Half-stop support for finer control.
MANUAL mode with over/underexposure scale.…
From the developer’s store description.
For developers and the curious
The evidence, sources, measurements and versions behind every label above.
No review analysis published for this app.
“Not assessed” means we could not measure it. It is never a zero and never a pass.
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.
Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
Not yet tested. No analysis has been run for this app, so there is no version or date to report.
Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
Bug fixes
grayzoneWhat the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
No itemized purchase list is available for this listing.
Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.
Write to [email protected], or use the form. Name the finding, the app version and the evidence that needs correcting. Factual corrections are free and never depend on buying anything.